Beryllium Copper (BeCu) Fingerstrip Gaskets

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1 Beryllium Copper (BeCu) Fingerstrip Gaskets EMC and Thermal Management Solutions Fothershield UNIT 3 GORRELLS WAY, TRANSPENNINE TRADING ESTATE, ROCHDALE, LANCS, UK. OL11 2PX E info@fothershield.co.uk T W

2 BERYLLIUM COPPER (BECU) FINGERSTRIP GASKETS Page Slot Mounted 5-10 Track Mount Adhesive Mount Low Profile 18 Twisted Series Enclosure Series Clip On Series Contact Series Fothershield s wide range of Beryllium Copper (BeCu) fingerstrip gaskets allows the customer to choose the right product for his application. You can be guaranteed the excellent service you deserve, so give us a call today and we ll find the perfect way to solve your problem. Beryllium copper (BeCu) fingerstrip gaskets give extremely high electromagnetic and radio frequency (EMI/RFI) shielding effectiveness and are ideal for repeated opening and closing application and where high attenuation, together with mechanical strength and fatigue resistance is required. Beryllium Copper has a high cycle time and conforms to large gap variations. It is a high performance metal which can easily be fabricated making it the perfect material for EMI shielding purposes. 1 Sales:

3 The spring quality of beryllium copper fingerstrip is far superior to any other EMI shielding gasket and offers the highest EMI shielding effectiveness together with consistent performance due to the hard wearing nature of the beryllium copper alloy. Advantages of Beryllium Copper (BeCu) Low compression force Highest strength copper alloy with high cycle life Maximum spring properties Excellent conductivity Conforms to large gap variations Dimensional stability Excellent for bi-directional applications Wide temperature variation and non-magnetic Resistance to stress relaxation Easy installation Non flammable Easy to plate Variety of mounting options, sizes and configurations RoHS compliant Electrochemical Compatibility To avoid galvanic action between contacting metals choosing materials within a single group in the table will provide the least corrosion due to galvanic action. Materials within adjacent groups may also be safely used together. Group 1 Group 2 Group 3 Group 4 Magnesium Aluminium Cadmium Plating Brass Magnesium Alloys Aluminium Alloys Carbon Steel Stainless Steel Aluminium Beryllium Iron Copper & Copper Alloys Aluminium Alloys Zinc & Zinc Plating Nickel & Nickel Plating Nickel/Copper Alloys Beryllium Chromium Plating Tin & Tin Plating Monel Zinc & Zinc Plating Cadmium Plating Tin/Lead Solder Silver Chromium Plating Carbon Steel Brass Iron Stainless Steel Nickel & Nickel Plating Copper & Copper Alloys Tin & Tin Plating Monel Tin/Lead Solder ANODIC CATHODIC 2 Sales:

4 Material Specifications We use Alloy 25 (C17200) strip material to provide the highest strength copper alloy for use in our fingerstrip gaskets. Alloy 25 gives greater electrical conductivity than other high strength copper alloys. The material is most commonly used for EMI shielding gaskets, springs, grounding strips, connector parts, aerospace and military, battery contacts and coil springs. Chemical Composition (Weight Percent) Alloy Beryllium Nickel + Cobalt Nickel + Cobalt + Iron Copper C % minimum 0.6% maximum Balance Physical Properties (Heat Treated) Elastic Modulus Melting Point (Solidus) Electrical Conductivity/ Resistivity Density Thermal Expansion Coefficient Thermal Conductivity (25 C) 19,000ksi 1600 F 22-25% IACS lb/in.³ 9.7 x 10ˉ⁶ in./in. F 0.60 BTU/ft.hr F 131Gpa 870 C μω cm 8.36g/cm³ 17.0 x 10ˉ⁶ C 105W/mK Mechanical Properties (Heat Treated) Temper Tensile Strength (MPa) Yield Strength.2% offset (MPa) ¼HT 175 Min. 150 Min. Manufacturing Tolerances (mm) Pitch ±0.127 Length ±1.52 Spring Height ±0.51 Cut Length ±0.61 Plating Finish Standard finish is 01, clean and bright finish. Standard plating thickness is mm minimum. Gold plating standard thickness is mm. The plating thickness may be varied to suit customers need. Common finishes are tin, nickel and zinc. Other finishes available on request. Shielding Performance Shielding effectiveness is based on the recommended 25% gasket deflection and tested in accordance with MIL-STD-285 test procedure. Low compression fingerstrip offer comparable shielding effectiveness to standard product. Gasket Material H-Field (100 khz) E-Field (10 MHz) Plane Wave (1 GHz) Standard Fingerstrip 110 db 100 db 95 db Low Compression Fingerstrip 105 db 95 db 90 db 3 Sales:

5 Tape Specification Non-conductive, double sided, acrylic pressure sensitive adhesive type 3M 9469PC or equivalent, 0.13mm thick, clear colour. Temperature range -40 C to 121 C. Shelf life 12 months. Apply at room temperature to a clean, dry surface. Remove any oily residues with rubbing alcohol. Once the gasket is in position, press firmly to achieve a good bond. Repositioning the gasket may impair the effectiveness of the adhesive or damage the strip. 50% of ultimate strength will be achieved after 20 minutes, 90% after 24 hours and 100% after 72 hours. Elevated temperatures may increase ultimate bond strength more quickly. The 3M tape is moisture, solvent and temperature tolerant and meets MIL standard specifications. The beryllium copper sheet material is stamped out to produce BeCu fingerstrip gaskets from our wide range of gasket tools. After removing any oils or greases the gaskets are heat treated, giving the gaskets their unique spring qualities. Optional plating and self-adhesive backing is applied before cutting to size. 4 Sales:

6 SLOT MOUNT SERIES GASKETS SINGLE SLOT MOUNTED SERIES The slot mounted series gaskets can be used in full lengths as EMI shielding gaskets, or cut to length to be used as ESD contacts. The gaskets can clip in to slots or can be mounted on tracks. FS-MB1216 Part No. A B C R1 R2 Thick. P S Length Fingers Finish (mm) (mm) FS-MB Bright FS-MB Tin FS-MB Nickel FS-MB Zinc FS-MB1116 Part No. A B C R1 R2 Thick. P S Length Fingers Finish (mm) (mm) FS-MB Bright FS-MB Tin FS-MB Nickel FS-MB Zinc 5 Sales:

7 FS-MB1077 Part No. A B C R1 R2 Thick P S Length Fingers Finish (mm) (mm) FS-MB1077S Bright FS-MB Bright FS-MB Tin FS-MB Nickel FS-MB1721 A B C R1 R2 Thick P S Length Fingers Finish Part No. (mm) (mm) FS-MB Bright FS-MB Tin FS-MB Nickel FS-MB Bright FS-MB Tin FS-MB Nickel FS-MB1728 Part No. A B C R1 R2 Thick P S Length Fingers Finish (mm) (mm) FS-MB Bright FS-MB Tin FS-MB Nickel FS-MB Bright FS-MB Tin FS-MB Nickel 6 Sales:

8 FS-MB1957 Part No. A B C D R1 R2 Thick P S L Fingers Finish (mm) (mm) (mm) FS-MB Bright FS-MB Tin FS-MB Nickel FS-MB Bright FS-MB Tin FS-MB Nickel FS-MB1457 Part No. A B C D R1 R2 Thick P S L Fingers Finish (mm) (mm) (mm) FS-MB Bright FS-MB Tin FS-MB Nickel FS-MB Bright FS-MB Tin FS-MB Nickel FS-MB1711 Part No. A B C R1 R2 Thick. P S L Fingers Finish (mm) (mm) FS-MB Bright FS-MB Tin FS-MB Nickel FS-MB Bright FS-MB Tin FS-MB Nickel 7 Sales:

9 FS-MB1533 Part No. A B C R1 R2 Thick P S L Fingers Finish (mm) (mm) FS-MB Bright FS-MB Tin FS-MB Nickel DUAL SLOT MOUNTED SERIES FS-MB1109 Part No. A B C R1 R2 Thick. P S L Fingers Finish (mm) (mm) FS-MB Bright FS-MB Tin FS-MB Nickel FS-MB1136 Part No. A B C R1 R2 Thick. P S L Fingers Finish (mm) (mm) FS-MB Bright FS-MB Tin FS-MB Nickel 8 Sales:

10 FS-MB1793 Part No. A B C R1 R2 Thick. P S L Fingers Finish (mm) (mm) FS-MB Bright FS-MB Tin FS-MB Nickel FS-MB Bright FS-MB Tin FS-MB Nickel FS-MB1756 Part No. A B C R1 R2 Thick. P S L Fingers Finish (mm) (mm) FS-MB Bright FS-MB Tin FS-MB Nickel FS-MB Bright FS-MB Tin FS-MB Nickel FS-MB1798 Part No. A B C R1 R2 Thick. P S L Fingers Finish (mm) (mm) FS-MB Bright FS-MB Tin FS-MB Nickel FS-MB Bright FS-MB Tin FS-MB Nickel 9 Sales:

11 FS-MB1061 Part No. A B C R1 R2 Thick. P S L Fingers Finish (mm) (mm) FS-MB Bright FS-MB Tin FS-MB Nickel FS-MB Bright FS-MB Tin FS-MB Nickel FS-MB4524 Part No. A B C R Thick. P S L Fingers Finish (mm) FS-MB Bright FS-MB Tin FS-MB Nickel 10 Sales:

12 TRACK MOUNT SERIES FS-MB1919 Part No. A B C Thick. P S L Track Fingers Finish FS-MB Brass 80 Bright FS-MB Brass 80 Tin FS-MB Brass 80 Nickel *Symmetrical slot. Supplied with black or white rivets FS-MB1958 Part No. A B C Thick. P S L Track Fingers Finish FS-MB Brass 80 Bright FS-MB Brass 80 Tin FS-MB Brass 80 Nickel *Single slot. Supplied with black or white rivets FS-MB1955 Part No. A B C Thick. P S L Track Fingers Finish FS-MB Brass 50 Bright FS-MB Brass 50 Tin FS-MB Brass 50 Nickel *Single slot. Supplied with black or white rivets 11 Sales:

13 FS-MB1952 Part No. A B C Thick. P S L Track Fingers Finish FS-MB Brass 40 Bright FS-MB Brass 40 Tin FS-MB Brass 40 Nickel *Single slot. Supplied with black or white rivets 12 Sales:

14 ADHESIVE MOUNT SERIES Adhesive mount gaskets are a general purpose gasket used in wiping and compression applications such as in enclosures, MRI doors and in shielded cabinets. FS-MB1114 Part No. A B C Thick. P S L 3M9469 Fingers Finish Tape FS-MB Bright FS-MB Tin FS-MB Nickel FS-MB1012 Part No. A B C E Thick. P S L 3M9469 Fingers Finish (mm) Tape FS-MB Bright FS-MB Tin FS-MB Nickel FS-MB Bright FS-MB1540 Part No. A B C Thick. P S L 3M9469 Fingers Finish Tape FS-MB Bright FS-MB Tin FS-MB Nickel FS-MB1540C Bright 13 Sales:

15 FS-MB1541 Part No. A B C Thick. P S L 3M9469 Fingers Finish Tape FS-MB Bright FS-MB Tin FS-MB Nickel FS-MB1541C Bright FS-MB1542 Part No. A B C Thick. P S L 3M9469 Fingers Finish Tape FS-MB Bright FS-MB Tin FS-MB Nickel FS-MB1542C Bright FS-MB1520 Part No. A B C Thick. P S L 3M9469 Fingers Finish Tape FS-MB Bright FS-MB Tin FS-MB Nickel FS-MB1520C Bright 14 Sales:

16 FS-MB1521 Part No. A B C Thick. P S L 3M9469 Fingers Finish Tape FS-MB Bright FS-MB Tin FS-MB Nickel FS-MB1521C Bright FS-MB1500 Part No. A B C Thick. P S L 3M9469 Fingers Finish Tape FS-MB Bright FS-MB Tin FS-MB Nickel FS-MB1500C Bright FS-MB1185 Part No. A B Thick. P S L 3M9469 Fingers Finish (mm) (mm) (mm) (mm) (mm) (mm) Tape FS-MB Bright FS-MB Tin FS-MB Nickel FS-MB1185C Bright 15 Sales:

17 FS-MB1078 Part No. A B C Thick. P S L 3M9469 Fingers Finish Tape FS-MB Bright FS-MB Tin FS-MB Nickel FS-MB1078C Bright FS-MB1538 Part No. A B C Thick. P S L 3M9469 Fingers Finish Tape FS-MB Bright FS-MB Tin FS-MB Nickel FS-MB1538C Bright FS-MB1537 Part No. A B C Thick. P S L 3M9469 Fingers Finish Tape FS-MB Bright FS-MB Tin FS-MB Nickel FS-MB1537C Bright 16 Sales:

18 FS-MB1782 Part No. A B C Thick. P S L 3M9469 Fingers Finish Tape FS-MB Bright FS-MB Tin FS-MB Nickel FS-MB1782C Bright FS-MB1014 Part No. A B C Thick. P S L 3M9469 Fingers Finish Tape FS-MB Bright FS-MB Tin FS-MB Nickel FS-MB1014C Bright 17 Sales:

19 LOW PROFILE SERIES FS-MB1743 Part No. A B D Thick. P E F L 3M9469 Fingers Finish (mm) Tape FS-MB Bright FS-MB Tin FS-MB Nickel FS-MB1743C Bright FS-MB1071 Part No. A B C D Thick. P S L 3M9469 Fingers Finish (mm) Tape FS-MB Bright FS-MB Tin FS-MB Nickel FS-MB1071C Bright 18 Sales:

20 TWISTED SERIES GASKETS Designed for demanding compression applications and narrow gap filling, the twisted series gaskets can compress to their material thickness, and give excellent shielding performance. FS-MB1550 Part No. A B C Thick. P S L 3M9469 Fingers Finish Tape FS-MB Bright FS-MB Tin FS-MB Nickel FS-MB1550C Bright FS-MB Bright FS-MB Tin FS-MB Nickel FS-MB2550C Bright FS-MB1551 Part No. A B E Thick. P S L 3M9469 Fingers Finish Tape FS-MB Bright FS-MB Tin FS-MB Nickel FS-MB1551C Bright FS-MB Bright FS-MB Tin FS-MB Nickel FS-MB2551C Bright FS-MS S/Steel FS-MS1551C S/Steel 19 Sales:

21 FS-MB1555 Part No. A B E Thick. P S L 3M9469 Fingers Finish Tape FS-MB Bright FS-MB Tin FS-MB Nickel FS-MB1551C Bright FS-MB Bright FS-MB Tin FS-MB Nickel FS-MB2555C Bright FS-MB1560 Part No. A B H Thick. P S L 3M9469 Fingers Finish Tape FS-MB Bright FS-MB Tin FS-MB Nickel FS-MB1560C Bright 20 Sales:

22 FS-MB1558 Part No. A B C H Thick. P S L 3M9469 Fingers Finish (mm) Tape FS-MB Bright FS-MB Tin FS-MB Nickel FS-MB1558C Bright FS-MB1559 Part No. A B E H Thick. P S L 3M9469 Fingers Finish (mm) Tape FS-MB Bright FS-MB Tin FS-MB Nickel 21 Sales:

23 ENCLOSURE SERIES FS-MB1535 FS-MB Bright FS-MB1640 Part No. A B C R1 Thick. P S L Fingers Finish (mm) FS-MB Bright FS-MB Tin FS-MB Nickel FS-MB1640MODA Bright FS-MB1640MODA Tin FS-MB1640MODA Nickel FS-MB1438 Part No. A B C D Thick. P S L Fingers Finish (mm) FS-MB Bright FS-MB Bright FS-MB1438C Bright FS-MB Tin FS-MB Nickel 22 Sales:

24 FS-MB1396 Part No. A B C R1 Thick. P S L Fingers Finish (mm) FS-MB Bright FS-MB Tin FS-MB Nickel FS-MB1396C Bright FS-MB1178 Part No. A B C E Thick. P S L Fingers Finish (mm) FS-MB Bright FS-MB Tin FS-MB Nickel FS-MB1440 Part No. A B C D Thick. P S L Fingers Finish (mm) FS-MB Bright FS-MB Tin FS-MB Nickel FS-MB1440C Bright 23 Sales:

25 FS-MBCA40 Part No. A B C D Thick. P S L Fingers Finish (mm) FS-MBCA Bright FS-MBCA Tin FS-MBCA Nickel FS-MBCA35 Part No. A B C D Thick. P S L Fingers Finish (mm) FS-MBCA Bright FS-MBCA Tin FS-MBCA Nickel FS-MB1535L FS-MB1535L Bright FS-MB1535L Bright FS-MB1535L Tin FS-MB1535L Nickel 24 Sales:

26 FS-MB1534 FS-MB Bright FS-MB1534C Bright FS-MB Tin FS-MB Nickel FS-MBT788 Part No. A B C R1 Thick. P S L Fingers Finish (mm) FS-MBT Bright FS-KA40 Part No. A B C D Thick. P S L Fingers Finish (mm) FS-MBKA Bright FS-LD40 Part No. A B C D Thick. P S L Fingers Finish (mm) FS-MBLD Bright 25 Sales:

27 CLIP ON SERIES Used in enclosures, cabinets, and on printed circuit boards (PCBs), as an ESD contact and an EMI shield, the clip on gaskets are edge mounted. FS-MB1613 Part No. A B C D Thick. P S L Fingers Finish (mm) FS-MB Bright FS-MB Tin FS-MB Nickel FS-MB1605 Part No. A B H E Thick. P S L Fingers Finish (mm) FS-MB Bright FS-MB Tin FS-MB Nickel *MB1605 is supplied with T Lance. For D Lance please use code MB1606 Supplied in 12.70mm increments. FS-MB1645 Part No. A B C D Thick. P S L Fingers Finish (mm) FS-MB Bright FS-MB Tin FS-MB Nickel FS-MB1645C Bright 26 Sales:

28 FS-MB1374 Part No. A B C E Thick. P S L Fingers Finish (mm) FS-MB Bright FS-MB Tin FS-MB Nickel *D Lance at 23.7mm intervals FS-MB1612 FS-MB Bright FS-MB Tin FS-MB Nickel FS-MB1612C Bright FS-MB1637 FS-MB Bright FS-MB Tin FS-MB Nickel FS-MB1637C Bright 27 Sales:

29 FS-MB1874 Part No. A B C E Thick. P S L Fingers Finish (mm) FS-MB Bright FS-MB Tin FS-MB Nickel FS-MB1874C Bright *D Lance at 25.4mm intervals FS-MB1655 FS-MB Bright FS-MB Tin FS-MB Nickel FS-MB1655C Bright FS-MB1656 Part No. A B C D Thick. P S L Fingers Finish (mm) FS-MB Bright FS-MB Tin FS-MB Nickel 28 Sales:

30 FS-MB1263 Part No. A B C D Thick. P S L Fingers Finish (mm) FS-MB Bright FS-MB Tin FS-MB Nickel FS-MB1263C Bright FS-MB1610 Part No. A B C D Thick. P S L Fingers Finish (mm) FS-MB Bright FS-MB Tin FS-MB Nickel FS-MB4012 FS-MB Bright FS-MB Tin FS-MB Nickel 29 Sales:

31 FS-MB1502 Part No. A B C E Thick. P S L Fingers Finish (mm) FS-MB Bright FS-MB Tin FS-MB Nickel FS-MB5000 FS-MB Bright FS-MB Tin FS-MB Nickel FS-MB1866 Part No. A B Thick. P S L Fingers Finish (mm) (mm) (mm) (mm) (mm) (mm) FS-MB Bright FS-MB1866C Bright 30 Sales:

32 FS-MB1602 FS-MB Bright FS-MB Tin FS-MB Nickel FS-MB1136 Part No. A B C E Thick. P S L Fingers Finish (mm) FS-MS1136-SS S/Steel FS-MB1934 FS-MS1934-SS S/Steel FS-MS1934C-SS S/Steel FS-MB4833 FS-MS4833-SS S/Steel FS-MS4833C-SS S/Steel 31 Sales:

33 CONTACT SERIES Primarily used for grounding and EMI shielding in high frequency applications, the contact gaskets are available in a wide range of sizes. These gaskets may also be supplied cut to length. FS-MB1221 FS-MB Bright FS-MB Tin FS-MB Nickel FS-MB1221C Bright FS-MB2320 FS-MB Bright FS-MB Tin FS-MB Nickel FS-MB1135 FS-MB Bright FS-MB Tin FS-MB Nickel FS-MB1135C Bright 32 Sales:

34 FS-MB1137 FS-MB Bright FS-MB Tin FS-MB Nickel FS-MB1137C Bright FS-MB1360 FS-MB Bright FS-MB Tin FS-MB Nickel FS-MB1360C Bright FS-MB1629 FS-MB Bright FS-MB Tin FS-MB Nickel FS-MB1629C Bright 33 Sales:

35 FS-MB1609 FS-MB Bright FS-MB Tin FS-MB Nickel FS-MB1609C Bright FS-MB1258 Part No. A B C D Thick. P S L Fingers Finish (mm) FS-MB Bright FS-MB Tin FS-MB Nickel FS-MB1258C Bright FS-MB6118 FS-MB Bright FS-MB6118C Bright 34 Sales:

36 FS-MB1008 FS-M Bright FS-MB1008C Bright FS-MB1436 FS-M Bright FS-MB1975 FS-MB Bright FS-MB Tin FS-MB Nickel All technical data herein is accurate to the best of our knowledge based on our most up to date testing information and material specifications. This information is not presented as a warranty or guarantee and is not intended to be all inclusive as to conditions of use. The data herein represents typical properties and is not to be used as a basis for a specification. 35 Sales: